<template>
    <div>
        <!-- 面包屑导航区 -->
       <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
       </el-breadcrumb>
       <!-- 卡片视图 -->
       <el-card>
           <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type = "primary">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <!-- 栅格系统 -->
                    <el-row :class="['bdbottom', i1===0 ? 'bdtop':'','vcenter']"  
                    v-for ="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable
                                @close="removeRightById(scope.row, item1.id)"
                                >{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <!-- 通过for循环 嵌套渲染二级权限 -->
                          <el-row :class="[i2===0 ? '':'bdtop','vcenter']" 
                            v-for="(item2,i2) in item1.children" 
                            :key="item2.id">
                            
                            <el-col :span="6">
                             <el-tag type="success"
                             closable
                                @close="removeRightById(scope.row, item1.id)"
                                >{{item2.authName}}</el-tag>
                             <i class="el-icon-caret-right"></i>
                            </el-col>

                            <el-col :span="18">
                                <el-tag type="warning" 
                                v-for="(item3,i3) in item2.children" 
                                :key="item3.id"
                                closable
                                @close="removeRightById(scope.row, item3.id)"
                                >{{item3.authName}}</el-tag>
                            </el-col>

                          </el-row>
                        </el-col>
                    </el-row>   
                </template>
            </el-table-column>
            <!-- 索引列 -->
           <el-table-column label="#" type="index"></el-table-column>
           <el-table-column label="角色名称" prop="roleName"></el-table-column>
           <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
           <el-table-column label="操作">
               <template slot-scope="scope" width="300px">
                   <!-- 修改按钮 -->
                   <el-button size="mini" type="primary" 
                   icon="el-icon-edit">搜索</el-button>
                   <!-- 删除按钮 -->
                   <el-button size="mini" type="danger" 
                   icon="el-icon-delete" >删除</el-button>
                   <el-button size="mini" type="warning" 
                   icon="el-icon-setting" 
                   @click="showSetRightDialog(scope.row)"
                   >分配权限</el-button>
                   <!-- 分配权限按钮 -->  
               </template>
           </el-table-column>
        </el-table>
       </el-card>

       <!-- 分配权限的对话框 -->
       <el-dialog
         title="分配权限"
         :visible.sync="setRightDialogVisible"
         width="50%"
         @close="setRightDialogClosed">

         <!-- 树形控件 -->
         <el-tree :data="rightslist" 
         :props="treeProps" 
         show-checkbox
         node-key="id"
         default-expand-all
         :default-checked-keys="defKeys"
         ref="treeRef"
         ></el-tree>

         <span slot="footer" class="dialog-footer">
           <el-button @click="setRightDialogVisible = false"
           >取 消</el-button>
           <el-button type="primary" @click="allotRights"
           >确 定</el-button>
         </span>
       </el-dialog>
       
    </div>
</template>


<script>
export default {
    data(){
        return{
            // 所有所有角色的列表
            rolelist:[],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            // 所有权限的数据
            rightslist:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选中的节点Id值数组
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId:[]
        }
        
    },
    created(){
        this.getRolesList()
    },
    methods:{
        // 获取所有角色的列表
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error('获取角色列表失败')
            }
            this.rolelist = res.data
            console.log(this.rolelist)
        },
        // 根据Id删除对应的权限
        async removeRightById(role,rightId){
          const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(confirmResult !== 'confirm'){
            return this.$message.info('取消了删除！')
        }
        // console.log('确认了删除')
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
         if(res.meta.status  !== 200){
            return this.$message.error('删除权限失败！')
        }
        // this.getRolesList()
        role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId = role.id
        //获取所有权限的数据
        const{data:res}= await this.$http.get('rights/tree')
        if(res.meta.status !== 200){
            return this.$message.error('获取权限数据失败！')
        }
        // 获取到的权限数据保存到data中
        this.rightslist = res.data
        console.log(this.rightslist)
        // 递归获取三级节点的Id
        this.getLeafKeys(role,this.defKeys)

        this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下的所有三级权限的Id，并保存到defKeys数组中
        getLeafKeys(node,arr){
            // 如果当前node节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item =>
            this.getLeafKeys(item,arr))
        },
        // 监听分配对话框的bug
        setRightDialogClosed(){
            this.defKeys =[]
        },
        // 点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.
                getCheckedKeys(),
                ...this.$refs.treeRef.
                getHalfCheckedKeys()
                  
            ]
            // console.log(keys)
            const idStr = keys.join(',')

            const {data:res} = await this.$http.post
            (`roles/${this.roleId}/rights`,{rids:idStr})
            
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败！')
            }
            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightDialogVisible = false

        }
        
        
  }   
}
</script>



<style lang="less" scoped>
.el-tag{
    margin :7px;
}
.bdtop{
    border-top:1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>

